After following up with Paragon and providing them photos of the bracket and manufacturer's stamp (photos previously posted), here is what they reported back (combining 2 emails):

Subject: RE: Fuel Line Support Bracket - Paragon Number: 2053K

"We still manufacture this part and still sell it under part# 2053K for$22.00 dollars. I currently have 42 in stock. This is what's left of the 500we produced in 2009.The "PR" stamp is ours and stands for Paragon Reproductions"

It is clear and confirmed the bracket with the <Pr> stamp is their reproduction part.

After following up with Paragon and providing them photos of the bracket and manufacturer's stamp (photos previously posted), here is what they reported back (combining 2 emails):

Subject: RE: Fuel Line Support Bracket - Paragon Number: 2053K

"We still manufacture this part and still sell it under part# 2053K for$22.00 dollars. I currently have 42 in stock. This is what's left of the 500we produced in 2009.The "PR" stamp is ours and stands for Paragon Reproductions"

It is clear and confirmed the bracket with the <Pr> stamp is their reproduction part.

Now this was a real learning experience! Noted the seller ended the sale so assume someone notified them???And agree, good work Paul!

Now that it's clear his part WAS a Paragon reproduction part, it's REALLY funny that he says in his ad "1969 Z28 used original rear fuel line bracket the attaches to the carburetor. Has the manufacturer stamp on it. Rare find. Don't use repo parts. Free Shipping via USPS Priority Mail with insurance" and ONLY $500 (starting bid) for this used $22 reproduction part???

I've dealt with him a couple of times and have even talked with him on the phone. He always seems very knowledgeable and honest and has a lot of hard to find NOS and original parts that are always very pricey. From my dealings with him I am very surprised that he sold a repop part and called it a "original GM part" for that crazy money. Just goes to show one has to be very careful and do lots of homework on any parts with any seller.